I discovered while my car was parked in the garage that the right front tire had a protruding sidewall next to the rim, with about a 4-inch split and exposed steel belt. On the same day I had the tire replaced for $293.61. Within the next week I discovered that all of the other three tires began showing protruding sidewalls. Note that the electronic inflation history shows no significant deviation from normal pressures. There were no crashes involving the vehicle. All 4 tires were the originals from the GM factory. Neither Cadillac, where the first tire was replaced, nor Michelin, the manufacturer, offer any warranty or credit toward replacement of any of the four tires. These tires appear to be defective with the potential safety issue for sudden blowout. There does not appear to be any external cause for this defect to occur at only 10,000 miles. The Michelin model # is 225/40R18. My local Cadillac service manager has stated that this has been reported to GM, and they will not assume any responsibility.

- Absecon, NJ, USA

I called the dealership (katherine cole who sold us the run flat tires), tweeted GM. No one at this point has been the least bit interested in what I had I to say. After my crash, on August 11, 2014, I have found several other Ats owners that experience the same exact issue..my daughter and I suffered terrible injuries, crash and totaled my car. I also am finding that there maybe a tire issue because of fast wear after only 7,000 miles. What, is GM or the tire manufacture or these safety org. Waiting for someone to die? I sent in a complaint in about my 2014 Cadillac Ats causing me to have a near fatal car accident. GM is claiming that the tires were worn and speed caused the accident, which is false. My car only had 7500 miles ( car was purchased with only 256 miles) and the tires were not worn! the car was just in for service for it?S premium care lease maintenance, the service advisor would have mentioned that at time! the speed was caused from the accident. My daughters abdomen was injured from the seat belt too! between GM and Michelin tires I am getting no where, they are pointing the finger to each other when I voted for you I thought you would fight for michiganders! how would you feel if I were your family member. I have been four surgeries and at least two more, please rethink your decision please help me. Updated 10/9/15 MA 10/29/2015

- Southfield, MI, USA

I was involved in a car crash on 8-11-14. My husband brought my a 2014 Cadillac Ats for my birthday. A few months after ownership I noticed that when it rained the car would hydroplane but the stabilitrak would make the vehicle jump back into it's lane. My husband thought I was being a brat, so I told him to drive the car. He took the car for a test drive and less than minutes into his test drive he said, "call the dealership and get these [xxx] tires off this car now" ! I called the dealership ([xxx]) and left a message with [xxx] [xxx] and explained the problems with the tires and to switch to regular tires not the runflat tires. She never called me back. A few days later, my daughter and I crashed. The car hydroplaned and lost control we hit two tress and took down a one way sign. My daughter and I suffered horrible injuries. I made a claim with GM esis dept., they denied my claim stating that the tires were worn and speed. I had no more 5000 miles at the time of the crash. There is no way the tires were worn nor speed. I took my car in for the lease maintenance package the dealership (Suburban Cadillac) did tire rotation and at time there was no mentation of my tire thread wearing down. When I mentioned to service dept about the problems with the tires the explanation I was given is that the run flat tires are like the big wheel (child plastic tricycle from the 80's) tires when it rains that's why plus tire are low profile. I contacted my state attorney general (no help), BBB (going through procedures currently), ftc (made a complaint), and contacted NHTSA(no help at all) to get help for an investigation and for GM. As a citizen of the United States I am so disappointed with the lack of support for the people that are supposed to assist citizens like me. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Southfield, MI, USA